Upgrade your headphone audio experience with the GRE50 Pro II 50mm Graphene Speaker Unit—designed for entry-level audiophiles seeking uncompromising sound quality at an affordable price.

Crafted with advanced materials, the driver features a graphene diaphragm that’s inherently lightweight yet rigid. We’ve enhanced the central dome area with additional hard coating to eliminate unwanted resonance, ensuring precise vibration and minimal distortion . Paired with the upgraded thick black wire voice coil, this combination delivers exceptional sound localization and crystal-clear detail retrieval—making every note, beat, and vocal stand out with remarkable clarity.

Available in two impedance options to suit your setup:

- 32Ω: Easy to drive with smartphones, laptops, or portable DACs, perfect for on-the-go listening without sacrificing performance.

- 300Ω: Ideal for desktop amplifiers, offering superior damping factor and lower distortion for immersive home audio sessions .

The integrated N48 high-performance magnet (15.5×3×2mm) boosts magnetic flux density, while the 117.91dB high sensitivity ensures powerful output with minimal power input. Whether you’re into classical, rock, or vocal tracks, the GRE50 Pro II delivers balanced, fatigue-free sound with well-defined bass, smooth mids, and extended highs—everything an entry-level audiophile needs for a true hi-fi experience.

High cost-performance doesn’t mean cutting corners. This driver combines premium graphene technology, upgraded components, and rigorous tuning to bring professional-grade audio to your DIY headphone projects or replacement needs.

3. Specification Sheet

Parameter Details

Model Name GRE50 Pro II

Driver Size 50mm

Impedance Options 32Ω / 300Ω

Sensitivity 117.91dB

Diaphragm Material Graphene (central dome with hard coating)

Voice Coil Thick Black Wire Voice Coil

Magnet Specification N48 Neodymium Magnet

Magnet Dimension 15.5×3×2mm

Application DIY Headphones, Headphone Replacement, Hi-Fi Audio Systems

Target Audience Entry-Level Audiophiles

Key Features Balanced sound, precise localization, low distortion, easy to drive (32Ω)